import "./waves.css";

const context = "@@wavesContext";

function handleClick(el, binding) {
	function handle(e) {
		const customOpts = Object.assign({}, binding.value);
		const opts = Object.assign(
			{
				ele: el, // 波纹作用元素
				type: "hit", // hit 点击位置扩散 center中心点扩展
				color: "rgba(0, 0, 0, 0.15)", // 波纹颜色
			},
			customOpts
		);
		const target = opts.ele;
		if (target) {
			target.style.position = target.style.position || "relative";
			target.style.overflow = "hidden";
			const rect = target.getBoundingClientRect();
			let ripple = target.querySelector(".waves-ripple");
			if (!ripple) {
				ripple = document.createElement("span");
				ripple.className = "waves-ripple";
				ripple.style.height = ripple.style.width = Math.max(rect.width, rect.height) + "px";
				target.appendChild(ripple);
			} else {
				ripple.className = "waves-ripple";
			}
			switch (opts.type) {
				case "center":
					ripple.style.top = rect.height / 2 - ripple.offsetHeight / 2 + "px";
					ripple.style.left = rect.width / 2 - ripple.offsetWidth / 2 + "px";
					break;
				default:
					ripple.style.top = (e.pageY - rect.top - ripple.offsetHeight / 2 - document.documentElement.scrollTop || document.body.scrollTop) + "px";
					ripple.style.left = (e.pageX - rect.left - ripple.offsetWidth / 2 - document.documentElement.scrollLeft || document.body.scrollLeft) + "px";
			}
			ripple.style.backgroundColor = opts.color;
			ripple.className = "waves-ripple z-active";
			return false;
		}
	}

	if (!el[context]) {
		el[context] = {
			removeHandle: handle,
		};
	} else {
		el[context].removeHandle = handle;
	}

	return handle;
}

export default {
	bind(el, binding) {
		el.addEventListener("click", handleClick(el, binding), false);
	},
};
